diff --git a/content_script.js b/content_script.js
index ff72c91..502af2d 100644
--- a/content_script.js
+++ b/content_script.js
@@ -35,11 +35,13 @@ function processMutations(mutationList, observer) {
 let clickThroughForms;
 let observer = new MutationObserver(processMutations);
 const addObserver = () => {
-    browser.storage.sync.get('autocontinue').then(v => {
+    browser.storage.sync.get(['autocontinue', 'enable']).then(v => {
         clickThroughForms = !!v.autocontinue;
-        observer.observe(document.body, {
-            childList: true, subtree: true
-        })
+        if (!!v.enable) {
+            observer.observe(document.body, {
+                childList: true, subtree: true
+            })
+        }
     })
 };
 
diff --git a/options/index.html b/options/index.html
index 22520ee..bcb8e57 100644
--- a/options/index.html
+++ b/options/index.html
@@ -9,6 +9,10 @@
 
 <body>
   <form>
+    <label class="item">
+      <span class="fh">Enable autofill</span>
+      <input name="enable" id="enable" type="checkbox" />
+    </label>
     <label class="item">
       <span class="fh">Your BahnCard 100 number</span><br />
       <span class="sh">The number on the front of your card starting with <span class="ms">7081</span>.</span><br>
diff --git a/options/script.js b/options/script.js
index 66a1321..bc7d384 100644
--- a/options/script.js
+++ b/options/script.js
@@ -47,6 +47,7 @@ async function saveOptions(ev) {
     return;
   }
   let autoContinue = this.querySelector('#autocontinue').checked;
+  let enable = this.querySelector('#enable').checked;
   let options = {
     bcnum: bcNum,
     bday: bDay,
@@ -68,6 +69,7 @@ async function restoreOptions() {
 
   let settings = await browser.storage.sync.get();
   console.log("restoring", settings);
+  document.querySelector('#enable').checked = settings.enable || true;
   document.querySelector("#bcnum").value = settings.bcnum || "";
   document.querySelector("#birthday").value = settings.bday || "";
   document.querySelector("#autocontinue").checked = settings.autocontinue || false;
